Air Preheater and Draught in Thermal Power Plant - MCQs with answers

Air Preheater and Draught in Thermal Power Plant - MCQs with answers

Q1. The use of air preheater increase the temp of the air by about______________.

a. 50°
b. 20°
c. 5°
d. 30°

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Q2. Air- preheater in a steam power plant_____________.

a. Recovers the heat from the flue gases leaving the economiser.
b. Improves combustion rate.
c. Raises the temperature of the furnace gases.
d. All of these.

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Q3. The definition of the draught system is

a. A device used to pull in air.

b. The difference between absolute gas pressure at any point in a gas flow and the ambient atmospheric pressure.

c. The sum of the absolute gas pressure at any point in a gas flow and the ambient atmospheric pressure.

d. A device used to pull out air.

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Q4. The draught produced by the chimney is________________.

a. Forced draught
b. Natural draught
c. Induced draught
d. Balanced draught.

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